| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2018 | |
| 2 | 2017 | |
| 3 | 2016 | |
| 4 | 2015 | |
| 5 | 2014 | |
| 6 | 2013 | |
| 7 | 2012 | 32.92 |
| 8 | 2011 | 32.90 |
| 9 | 2009 | 32.53 |
| 10 | 2008 | 32.00 |
| 11 | 2007 | 31.93 |
| 12 | 2006 | 31.94 |
| 13 | 2005 | 27.09 |
| 14 | 2004 | 27.26 |
| 15 | 2003 | 27.63 |
| 16 | 2002 | 25.55 |
| 17 | 2001 | 25.39 |
| 18 | 2000 | 25.46 |
